If an oil-secreting gland in the eyelid becomes blocked, the gland enlarges, creating a swelling called a chalazion. It is a swelling in the eyelid that may be painless. A chalazion is also referred to as a meibomian cyst or tarsal cyst Eyelid glands are called the meibomian glands. They are also known as the palpebral glands, tarsal glands, or tarsoconjunctival glands. The … [Read more...]